body,
ul,
li,
a {
  padding: 0;
  margin: 0;
  text-decoration: none;
  list-style: none;
}
html,
body {
    height: 1800px;
  font: 14px/1.5 "PingFang SC", "微软雅黑", "Microsoft YaHei", Helvetica, "Helvetica Neue", Tahoma, Arial, sans-serif;
  color: #1c1f21;
  
  background-color: #f8fafc;
}
a:link,
a:visited {
  color: #1c1f21;
}

/* new标记 */
.header .new{
    position: relative;
}
.header .new::before{
    position: absolute;
    top: 14px;
    right: 4px;
    width: 16px;
    height: 16px;
    display: inline-block;
    content: "";
    background-image: url(./img/new.png);
    background-repeat: no-repeat;
    background-size: contain;
}


.header{
    position: relative;
    min-width: 900px;
    height: 72px;
    box-shadow: 0 4px 8px 0 rgba(7, 17, 27, 0.1);
    background: #FFFFFF;
}
.headerfixed{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 900;
}
.header .container{
    box-shadow: 0 4px 8px 0 rgba(7, 17, 27, 0.1);
    padding: 0 20px;
    z-index: 900;
}
.header .logo{
    float: left;
    height: 100%;
}
.header .logo a{
    /* 如果display设为inline-block，那么就要设vertical:botton */
    display: block;
    width: 140px;
    height: 72px;
}
.header .logo img{
    height: 100%;
}

.header .nav-list{
    float: left;
    margin-left: 20px;
}
.header .nav-item{
    float: left;
}
.header .nav-item a{
    display: inline-block;
    padding: 0 20px;
    height: 72px;
    line-height: 72px;
    color: #4D555D;
    font-size: 16px;
}

.header .search{
    float: left;
    height: 72px;
    display: flex;
    align-items: center;
    margin-left: 24px;
}
.header .search-area{
    position: relative;
    height: 40px;
    width: 324px;
    background: #E9E9E9;
    border-radius: 8px;
}
.header .search-input{
    box-sizing: border-box;
    height: 100%;
    width: calc(100% - 40px);
    color: #A6A6A6;
    background-color: transparent;
    padding: 8px 12px;
    line-height: calc(100% - 16px);
}

.header .search-btn{
    box-sizing: border-box;
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    width: 40px;
    color: #000;
    background-color: transparent;
    font-size: 18px;
    font-weight: bold;
}
.header .search-hotwords{
    position: absolute;
    right: 40px;
    top: 0;
}
.header .search-hotwords span{
    display: inline-block;
    height: 40px;
    line-height: 40px;
    color: #545c63;
    font-size: 14px;
    padding: 0 8px;
    cursor: pointer;
}
.header .search-hotwords span:hover{
    color: red;
}
.header .info{
    float: right;
}
.header .info-list{

}
.header .info-list li{
    float: left;
}
.header .info-list li a{
    display: inline-block;
    vertical-align: bottom;
    color: #71777d;
    font-size: 14px;
    padding: 0 15px;
    height: 72px;
    line-height: 72px;
}
.header .info-list li a:hover{
    color: red;
}

.header .info .cart{
    line-height: 72px;
    height: 72px;
}
.header .info-list  .cart a{
    display: inline-block;
    vertical-align: baseline;
    width: 104px;
    height: 36px;
    border: 1px solid #D9DDE1;
    border-radius: 18px;
    text-align: center;
    line-height: 36px;
    box-sizing: border-box;
}
.header .login{
    height: 72px;
    line-height: 72px;
}
.main{
    min-width: 1200px;
}
.main .bg01{
    background-color: #fff !important;
    box-shadow: 0 2px 8px 0 rgba(7, 17, 27, 0.06);
}
.main .bg02{
    box-shadow: 0 2px 4px 0 rgba(7, 17, 27, 0.06);
}

.main .container{
    width: 1152px;
    margin: 0 auto;
}
.carousel-con{
    padding-top: 32px;
}
.carousel{
    position: relative;
    width: 1152px;
    height: 382px;
    overflow: hidden;
    border-radius: 15px;
}
.carousel .menu-con{
    display: flex;
    align-items: center;
    position: absolute;
    left: 0;
    top: 0;
    width: 216px;
    height: 382px;
    background: #2b333b;
}
.carousel .menu-list{
    width: 100%;
}
.carousel .menu-item{
    position: relative;
    height: 50px;
    line-height: 50px;
    padding-left: 12px;
    cursor: pointer; 
}
.carousel .menu-item::after{
    position: absolute;
    right: 15px;
    top: 0;
    content: "\25BA";
    display: block;
    color: rgba(255, 255, 255, 0.6);
    font-size: 10px;
}
.carousel .menu-item a{
    display: block;
    color: rgba(255, 255, 255, 0.6);
    padding: 0 16px;
    height: 50px;
    line-height: 50px;
    font-size: 14px;
    border-top-left-radius: 5px;
  border-bottom-left-radius: 5px;
   
}
.carousel .menu-item:hover a{
    color: #fff;
    background-color: rgba(255, 255, 255, 0.3);
}
.carousel .banner-con{
    position: absolute;
    right: 0;
    top: 0;
    width: 936px;
    height: 382px;
}
.carousel .banner-list{

}
.carousel .banner-item{
    position: absolute;
}
.carousel .banner-item a{
    display: block;
    height: 382px;
}
.carousel .banner-item a img{
    height: 100%;
}


.carousel .banner-con .btn{
    position: absolute;
    top: 50%;
    margin-top: -24px;
    width: 48px;
    height: 48px;
    overflow: hidden;
    line-height: 48px;
    background: rgba(28, 31, 33, 0.1);
    border-radius: 50%;
    font-size: 32px;
    color: #FFFFFF;
    text-align: center;
    cursor: pointer;
}
.carousel .banner-con .btn:hover{
    background: rgba(28, 31, 33, 0.5);
}
.carousel .banner-con .prev{
    left: 15px;
}

.carousel .banner-con .next{
    right: 15px;
}


.carousel .banner-con .dots{
    position: absolute;
    bottom: 20px;
    right: 24px;
}
.carousel .banner-con .dots li{
    float: left;
    cursor: pointer;
    padding: 4px;
}
.carousel .banner-con .dots li::before{
    display: block;
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.75);
    transition: all 0.8s;
}
.carousel .banner-con .dots li:hover::before{
    background: rgba(255, 255, 255, 0.35);
}
.carousel .banner-con .dots li.active::before{
    width: 20px;
}

.zero-basis{
    margin-top: 44px;
}
hgroup{
    height: 32px;
    display: flex;
    align-items: center;
}
.group .tit{
    float: left;
    font-size: 24px;
    font-weight: bold;
    color: #1C1F21;
    letter-spacing: 0px;
    line-height: 32px;
}
.group .des{
    float: left;
    font-weight: normal;
    font-size: 14px;
    color: #545C63;
    margin-left: 12px;
}
.zero-basis .category{
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
}
.zero-basis .category-item{
    
}
.zero-basis .category-item a{
    display: flex;
    align-items: center;
    width: 216px;
    height: 80px;
    background: #f3f5f6;
    border-radius: 8px;
    transition: all .3s;
}
.zero-basis .category-item a:hover{
    box-shadow: 0px 4px 8px #0000001f;
}
.zero-basis .category-item .logo{
    float: left;
    display: block;
    width: 50px;
    height: 50px;
    margin: 0 10px 0 12px;
    background-image: url('./img/path-2019-9.png');
    background-size: 50px;
}
.zero-basis .category-item .tit{
float: left;
font-size: 16px;
    font-weight: bold;
    color: #1C1F21;
    letter-spacing: 1px;
}
.zero-basis .category-item .des{
float: left;
font-size: 12px;
    color: #1C1F21;
    line-height: 16px;
    margin-top: 2px;
    font-weight: 400;
}

.promote{
    margin: 44px 0 0 0;
}
.promote .promote-list{
    margin-top: 24px;
    padding-bottom: 44px;
    display: flex;
    justify-content: space-between;
}
.promote .promote-item{
    
}
.promote .promote-item a{
    display: block;
    width: 368px;
    height: 90px;
    background-size: cover;
    background-repeat: no-repeat;
}

.newCourse{
    margin-top: 44px;
    padding-bottom: 38px;
}
.newCourse .course-list{
    margin-left: -24px;
    margin-top: 24px;
}
.newCourse .course-item{
    float: left;
    margin-left: 24px;
    margin-bottom: 12px;
    width: 270px;
}
.newCourse .course-item a{
    display: block;
}
.newCourse a .img-con{
    position: relative;
    width: 270px;
    height: 148px;
    
    transition: all 0.3s;
}
.newCourse a .img-con img{
    width: 100%;
    border-radius: 8px;
}

.newCourse a .des-con{
    padding: 8px;
}
.newCourse .des-con .title{
    font-size: 16px;
    color: #07111B;
    line-height: 24px;
    word-wrap: break-word;
    transition: all .3s;
    font-weight: bold;
    height: 46px;
}
.newCourse a:hover .title{
    color: red;
}
.newCourse .des-con .des{
    margin-top: 4px;
    font-size: 12px;
    color: #9191a1;
    font-weight: 400;
    line-height: 18px;
}
.newCourse .des-con .des span{
    margin-right: 12px;
}

.newCourse .des-con .des .eval{
    float: right;
}
.newCourse .des-con .price{
    font-size: 12px;
    color: #545C63;
}

.learningRoute{
    padding-top: 36px;
    padding-bottom: 38px;
}

.click-nav-list{
    margin-left: 36px;
}
.click-nav-list .nav-item{
    float: left;
    margin: 0 14px;
    font-size: 14px;
}
.click-nav-list .nav-item a{
    display: block;
    color: #545c63;
    height: 30px;
    line-height: 30px;
}
.click-nav-list .nav-item a:hover{
    color: red;
}
.click-nav-list .nav-item.active a{
    color: red;
    border-bottom: 2px solid red;
}
.learningRoute .more{
   margin-left: auto;
}
.learningRoute .route-list{

}
.learningRoute .route-item{
margin-left: -24px;
margin-top: 24px;
}
.learningRoute .route-item a{
    display: block;
    width: 564px;
    height: 168px;
    margin-left: 24px;
    margin-bottom: 24px;
    float: left;
}
.learningRoute .route-item .img-con{
    position: relative;
    float: left;
    width: 140px;
    height: 140px;
    
}
.learningRoute .route-item .img-con .up,
.learningRoute .route-item .img-con .mid,
.learningRoute .route-item .img-con .down{
    position: absolute;
    background-repeat: no-repeat;
    background-size: cover;
    border-radius: 8px;
    left: 50%;
    transition: all 0.3s;
}
.learningRoute .route-item .img-con .up{
    width: 140px;
    height: 140px;
    margin-left: -70px;
    bottom: 0;
    z-index: 3;
}
.learningRoute .route-item .img-con .mid{
    width: 132px;
    height: 132px;
    margin-left: -66px;
    bottom: -4px;
    opacity: 0.4;
    z-index: 2;
}
.learningRoute .route-item .img-con .down{
width: 124px;
height: 124px;
margin-left: -62px;
bottom: -8px;
opacity: 0.2;
z-index: 1;
}
.learningRoute .route-item a:hover .img-con .up{
    bottom: 5px;
}
.learningRoute .route-item a:hover .img-con .mid{
    bottom: 0;
    width: 128px;
    margin-left: -64px;
}
.learningRoute .route-item a:hover .img-con .down{
    bottom: -5px;
    width: 118px;
    margin-left: -59px;
}
.learningRoute .route-item .des-con{
    float: left;
    margin-left: 24px;
    width: 400px;
}
.learningRoute .route-item .title{
    margin: 8px 0;
    font-size: 16px;
    color: #1C1F21;
    line-height: 20px;
    min-height: 20px;
    font-weight: bold;
}
.learningRoute .route-item a:hover .title{
    color: #F20D0D;
}
.learningRoute .route-item .des{
    font-size: 14px;
    color: #545c63;
    letter-spacing: 0;
    line-height: 20px;
    height: 60px;
}
.learningRoute .route-item .info{
    font-size: 12px;
    color: #9199A1;
    height: 18px;
    line-height: 18px;
}
.learningRoute .route-item .info .step{

}
.learningRoute .route-item .info .people{
margin-left: 33px;
}

.hotCourse{
    padding-top: 38px;
    padding-bottom: 36px;
}

.hotCourse .icon-question{
    margin-left: 6px;
    color: #b2b8bd;
    cursor: pointer;
    font-size: 22px;
    line-height: 26px;
}

.hotCourse .microLesson{
    display: none;
    width: 272px;
    height: 32px;
    border-radius: 16px;
    background-image: url('./img/banner_weike.png');
    background-size: contain;
    background-repeat: no-repeat;
    margin-left: auto;
}
.hotCourse .course-list{
margin-left: -24px;
margin-top: 24px;
}
.hotCourse .course-item{
    float: left;
    width: 270px;
margin-left: 24px;
margin-bottom: 12px;
}
.hotCourse .course-item a{
    display: block;
}
.hotCourse .course-item .img-con{
width: 270px;
height: 148px;
position: relative;
}
.hotCourse .course-item .img-con img{
    width: 100%;
    height: 100%;
    border-radius: 8px;
}

.hotCourse .course-item .des-con{
    padding: 8px;
}
.hotCourse .course-item .des-con .title{
    font-size: 16px;
    color: #07111B;
    line-height: 24px;
    word-wrap: break-word;
    transition: all .3s;
    font-weight: bold;
    height: 46px;
}
.hotCourse .course-item a:hover .title{
    color: red;
}
.hotCourse .course-item .des-con .des{
    font-size: 12px;
    color: #9199A1;
    line-height: 18px;
    margin-top: 4px;
    font-weight: 400;
}
.hotCourse .course-item .des-con .des span{
    margin-right: 12px;
}
.hotCourse .course-item .des-con .des p{
    margin-top: 4px;
    word-wrap: break-word;
}

.specialColumn{
    padding-top: 38px;
    padding-bottom: 36px;
}
.specialColumn .group .more{
    margin-left: auto;
}
.specialColumn .column-list{
    margin-left: -24px;
    margin-top: 24px;
}
.specialColumn .column-item{
    float: left;
    padding: 18px;
    margin-left: 24px;
    margin-bottom: 24px;
    width: 332px;
    transition: all .3s;
}
.specialColumn .column-item:hover{
    background: #FFFFFF;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
.specialColumn .column-item .img-con{
    float: left;
    width: 104px;
}
.specialColumn .column-item .img-con img{
width: 100%;
}
.specialColumn .column-item .img-con .tryReading{
    display: inline-block;
    color: #3377FF;
    font-size: 10px;
    font-weight: bold;
    width: 30px;
    height: 20px;
    text-align: center;
    line-height: 20px;
    background: rgba(7, 17, 27, 0.1);
    margin-top: 5px;
}

.specialColumn .column-item .des-con{
    float: left;
    margin-left: 8px;
    width: 220px;
}
.specialColumn .column-item .des-con .title{
    line-height: 22px;
    height: 44px;
}
.specialColumn .column-item .des-con .title a{
    color: #1C1F21;
    font-size: 14px;
    font-weight: bold;
}
.specialColumn .column-item .des-con .title a:hover{
    color: #3377FF;
}
.specialColumn .column-item .des-con .quantity{
    font-size: 12px;
    color: #9199A1;
    padding: 10px 0;
    border-bottom: 1px solid rgba(28, 31, 33, 0.1);
}
.specialColumn .column-item .des-con .author{
    font-size: 12px;
    height: 16px;
    line-height: 16px;
    margin: 10px 0;
    
}
.specialColumn .column-item .des-con .author a{
    color: #1c1f21;
}
.specialColumn .column-item .des-con .author a:hover{
    color: red;
}
.specialColumn .column-item .des-con .author a span{
    font-weight: bold;
}
.specialColumn .column-item .des-con .price{
    position: relative;
    margin-top: 17px;
}
.specialColumn .column-item .des-con .sale{
    font-size: 16px;
    color: #3377FF;
    line-height: 32px;
    font-weight: bold;

}
.specialColumn .column-item .des-con del{
    margin-left: 8px;
    font-size: 12px;
    color: #9199A1;
    line-height: 30px;
}
.specialColumn .column-item .des-con .discount{
    position: absolute;
    right: 0;
    top: 50%;
    margin-top: -8px;
    color: #fff;
    line-height: 16px;
    height: 16px;
    background-image: linear-gradient(90deg, #3377ff 0, #74ccff 99%);
    padding: 2px 6px;
    font-size: 12px;
}

.footer{
    padding:36px 0;
}
.footer .container{
    position: relative;
    width: 1152px;
    margin: 0 auto;
}
.footer .nav-list{
    height: 28px;
}
.footer .nav-item{
    float: left;
    margin: 0 10px;
}
.footer .nav-item a{
    color: #99a1a6;
    font-size: 14px;
    line-height: 28px;
}
.footer .nav-item a:hover{
    color: #07111B;
}
.footer .info{
    font-size: 12px;
    padding: 0;
    padding-left: 10px;
    text-align: left;
    margin-top: 8px;
    color: #93999F;
    line-height: 24px;
}
footer .info a{
    color: #93999F;
}
.footer .info>*{
    margin-right: 10px;
}
.footer .info .beian{
    display: inline-block;
    width: 16px;
    height: 16px;
    background-image: url('./img/beianicon.png');
    background-repeat: no-repeat;
    background-size: contain;
    vertical-align: -2px;
}
.footer .footer-link{
position: absolute;
right: 0;
top: 0;
}
.footer .link-item{
    float: left;
    margin-right: 32px;
    text-align: center;
}
.footer .link-item a{
    position: relative;
    display:block;
    width: 32px;
    height: 32px;
    line-height: 32px;
    margin: 0 auto;
    font-size: 30px;
    color: #D9DDE1;
}
.footer .link-item a:hover{
    color: #B7BBBF
}
.footer .link-item .icon-weixin .QRcode{
    position: absolute;
    display: none;
    left: 50%;
    margin-left: -86px;
    bottom: 32px;
    width: 172px;
    height: 212px;
    background-image: url('./img/elevator.png');
    background-repeat: no-repeat;
    background-size: 172px;
    background-position: 0 0;
}
.footer .link-item .icon-weixin:hover .QRcode{
    display: block;
}
.footer .link-item span{
    text-align: center;
    font-size: 12px;
    color: #4D555D;
    line-height: 24px;
    margin-top: 4px;
}

.elevator{
    position: fixed;
    right: 0;
    top: 55%;
    margin-top: -140px;
    background-color: #fff;
    box-shadow: 0px 4px 12px 0px rgba(7, 17, 27, 0.1);
    z-index:899;
    padding: 0 16px;
}
.elevator li{
    
    width:26px;
    padding: 16px 0;
    border-bottom: 1px solid #edf1f2;
}
.elevator li.return{
    display: none;
}
.elevator li a{
    width: 26px;
    height: 26px;
    display: block;
    color: #b5b9bc;
    text-align: center;
}
.elevator li a i[class*='icon-']{
    display: block;
    height: 26px;
    line-height: 26px;
    font-size: 24px;
}
.elevator li a:hover i[class*='icon-']{
    display: none;
}
.elevator li a span{
    display: none;
    height: 26px;
    font-size: 12px;
    line-height: 13px;
    color: #07111b;
}

.elevator li a:hover span{
    display: block;
}
.elevator li .QRcode{
    position: absolute;
    bottom: -13px;
    right: 50px;
    width: 172px;
    height: 212px;
    background-image: url('./img/elevator.png');
    background-repeat: no-repeat;
    background-size: cover;
    transform-origin: right bottom;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.25s, transform .3s;
}
.elevator li:hover .QRcode{
    opacity: 1;
    transform: scale(1);
}
.elevator li .icon-app~.QRcode{
    background-position: 0 -220px;
}
.elevator li .icon-weixin~.QRcode{
    background-position: 0 0;
}